Flux cleaning apparatus

ABSTRACT

A flux cleaning apparatus for cleaning an object with flux by removing impurities that include flux from the object with flux includes a body, a mount, at least one steam spraying nozzle, and a steam supplying unit. The mount is coupled with the body for mounting the object with flux. The at least one steam spraying nozzle is coupled with the body for spraying steam toward the object with flux on the mount such that the object with flux is cleaned by the steam sprayed from the steam spraying nozzle. The steam supplying unit is coupled with the body and the steam supplying unit supplies steam to the at least one steam spraying nozzle.

CROSS-REFERENCE TO RELATED APPLICATION

Korean Patent Application No. 10-2010-0064875, filed on Jul. 6, 2010, inthe Korean Intellectual Property Office, and entitled: “Flux CleaningApparatus,” is incorporated by reference herein in its entirety.

BACKGROUND

When a wire or a solder ball is bonded in a semiconductor fabricationprocess, a flux application process may be used. The flux applicationmay include applying flux to a pad of a substrate to, e.g., improveadhesiveness of the bonding material being used.

SUMMARY

Embodiments may be realized by providing a flux cleaning apparatus forcleaning an object with flux by removing impurities that include fluxfrom the object with flux. The apparatus includes a body, a mountcoupled with the body for mounting the object with flux, at least onesteam spraying nozzle coupled with the body for spraying steam towardthe object with flux on the mount such that the object with flux iscleaned by the steam sprayed from the steam spraying nozzle, and a steamsupplying unit coupled with the body such that the steam supplying unitsupplies steam to the at least one steam spraying nozzle.

The apparatus may include a nozzle rotation shaft having the at leastone steam spraying nozzle thereon such that a spraying angle of thesteam spraying nozzle is adjustable. The apparatus may include arotation knob on an end of the nozzle rotation shaft such that thenozzle rotation shaft is movable by a user via the rotation knob. Theapparatus may include a motor that rotates the nozzle rotation shaftaccording to a control signal generated from a control unit based on acommand input via a command input unit, the motor being coupled with thenozzle rotation shaft.

The apparatus may include a reciprocator that moves the at least onesteam spraying nozzle in back and forth directions along a surface ofthe object with flux. The reciprocator may include a movable base, theat least one steam spraying nozzle being connected to the movable base,a guidance member that guides a path in which the movable base ismovable, an actuator in the body, the actuator being configured to movethe movable base in the back and forth directions, and a control unit,the control unit being configured to apply a control signal to theactuator based on a command input by a command input unit.

The apparatus may include a clamp that fixes the object with flux byholding side surfaces of the object with flux, the clamp being coupledwith the mount. The apparatus may include a cleaning chamber in thebody, the cleaning chamber having an internal space for housing themount and the steam spraying nozzle. The apparatus may include a capwith a handle on top of the cleaning chamber, the cap being removablefrom the cleaning chamber for inserting and removing the object withflux from the cleaning chamber. The apparatus may include a transparentwindow in a sidewall of the cleaning chamber such that an interior ofthe cleaning chamber is observable by a user.

The apparatus may include an exhausting unit connected to the cleaningchamber such that steam sprayed by the steam spraying nozzle isdischarged to an outside of the body via the exhausting unit. Theexhausting unit may be an exhausting pipe that forcefully dischargessteam via an exhausting hole in a side surface of the cleaning chamber.The apparatus may include a discharging tray coupled with the body, thedischarging tray collecting impurities removed from the object withflux. The discharging tray may be a drawer-type tray under the cleaningchamber, and the discharging tray may include a handle on a side thereofsuch that impurities collected by the discharging tray are dischargable.

Embodiments may also be realized by providing a flux cleaning apparatusincluding an object with flux being cleaned by the flux cleaningapparatus by removing impurities that include flux from the object withflux. The system includes a flux tool, the flux tool being the objectwith flux being cleaned by the flux cleaning apparatus, and the fluxcleaning apparatus. The flux tool includes a flux tool body thatincludes a flow space therein, a back plate within the flow space of theflux tool body, a flux pin, the flux pin include a first tip on the backplate and a second tip outside the flux tool body, the second tipextending through a pin hole in the flux tool body, and an elasticspring, the elastic spring being between the back plate and the fluxtool body such that a recovery force is exerted in a direction in whichthe flux pin is movable. The flux cleaning apparatus includes a body, amount coupled with the body for mounting the flux tool, at least onesteam spraying nozzle coupled with the body for spraying steam towardthe flux tool on the mount such that the flux tool is cleaned by thesteam sprayed from the steam spraying nozzle, and a steam supplying unitcoupled with the body, the steam supplying unit supplying steam to theat least one steam spraying nozzle.

The system may include a positive pressure forming unit that produces apositive pressure in the flow space of the flux tool body to protect theflux tool body from the steam sprayed from the at least one steamspraying nozzle. The positive pressure forming unit may be a positivepressure forming gas supplying pipe that supplies a positive pressureforming gas to an inlet in the flux tool body.

The system may include an air curtain forming unit that provides an aircurtain between the flux pin and the flux tool body to protect the fluxtool body from the steam sprayed from the at least one steam sprayingnozzle. The air curtain forming unit may be an air spraying nozzle onthe body, the air spraying nozzle being configured to spray air to aspace between the flux pin and the flux tool body.

Embodiments may also be realized by providing a method of cleaning anobject with flux. The method includes providing a flux cleaningapparatus that includes a body, mounting the object with flux to a mountin the body of the flux cleaning apparatus, supplying steam to at leastone steam spraying nozzle from a steam supplying unit in the body of theflux cleaning apparatus, and spraying steam from the at least one steamspraying nozzle in the body of the flux cleaning apparatus, the steambeing sprayed toward the object with flux on the mount such that theobject with flux is cleaned by the steam sprayed from the steam sprayingnozzle. The cleaning of the object with flux includes removingimpurities that include flux from the object with flux.

BRIEF DESCRIPTION OF THE DRAWINGS

Features will become apparent to those of ordinary skill in the art bydescribing in detail exemplary embodiments with reference to theattached drawings, in which:

FIG. 1 illustrates a diagram of a flux cleaning apparatus, according toan exemplary embodiment;

FIG. 2 illustrates in closer detail a diagram of a cleaning status of aflux tool by using the flux cleaning apparatus of FIG. 1;

FIG. 3 illustrates a front perspective view of a flux cleaningapparatus, according to an exemplary embodiment;

FIG. 4 illustrates a rear perspective view of the flux cleaningapparatus of FIG. 3;

FIG. 5 illustrates a partially exploded perspective view showing anobject with flux mounted in the flux cleaning apparatus of FIG. 3;

FIG. 6 illustrates a perspective view showing a steam spraying status ofa steam spraying nozzle of FIG. 5 in closer detail;

FIG. 7 illustrates a plan view of the structure of the flux cleaningapparatus shown in FIG. 5;

FIG. 8 illustrates a lateral view of the structure of the flux cleaningapparatus shown in FIG. 5; and

FIG. 9 illustrates a rear view of the structure of the flux cleaningapparatus shown in FIG. 5.

DETAILED DESCRIPTION

Example embodiments will now be described more fully hereinafter withreference to the accompanying drawings; however, they may be embodied indifferent forms and should not be construed as limited to theembodiments set forth herein. Rather, these embodiments are provided sothat this disclosure will be thorough and complete, and will fullyconvey the scope of the invention to those skilled in the art. It willbe understood by those skilled in the art that various changes in formand details may be made therein without departing from the spirit andscope of the inventive concept.

In the drawing figures, the dimensions of elements may be exaggeratedfor clarity of illustration. It will also be understood that when anelement is referred to as being “on” another element, it can be directlyon the other element, or intervening elements may also be present.Further, it will be understood that when an element is referred to asbeing “under” an element, it can be directly under the other element, orintervening elements may also be present. In addition, it will also beunderstood that when an element is referred to as being “between” twoelements, it can be the only element between the two elements, or one ormore intervening elements may also be present. Like reference numeralsrefer to like elements throughout.

FIG. 1 illustrates a diagram of a flux cleaning apparatus according toan exemplary embodiment. FIG. 2 illustrates a diagram, in closer detail,of a cleaning status of a flux tool 2 by using the flux cleaningapparatus of FIG. 1.

Referring to FIGS. 1 and 2, the flux cleaning apparatus, according to anexemplary embodiment, may include a body 10, a mount 20, a steamspraying nozzle 30, a steam supplying unit 40, a reciprocator 50, adischarging tray 60, an air curtain forming unit 70, a positive pressureforming unit 80, and an exhausting unit 90. However, embodiments are notlimited thereto, e.g., various combinations that include or exclude onesof the above components and units may be used in a flux cleaningapparatus

The body 10 may form the outer appearance of the flux cleaningapparatus. The body 10 may support and/or house therein variouscomponents including, e.g., the body 10 may support at least one of themount 20, the steam spraying nozzle 30, the steam supplying unit 40, thereciprocator 50, the discharging tray 60, the air curtain forming unit70, the positive pressure forming unit 80, and the exhausting unit 90. Acleaning chamber R may be formed inside the body 10 to, e.g., house themount 20 and the steam spraying nozzle 30.

FIG. 3 illustrates a front perspective view of the flux cleaningapparatus according to an exemplary embodiment. FIG. 4 illustrates arear perspective view of the flux cleaning apparatus of FIG. 3. FIG. 5illustrates a partially exploded perspective view of the object withflux 1 mounted in the flux cleaning apparatus of FIG. 3. FIG. 6illustrates a perspective view of a steam spraying status of the steamspraying nozzle 30 of FIG. 5, in closer detail. FIG. 7 illustrates aplan view of the structure of the flux cleaning apparatus illustrated inFIG. 5. FIG. 8 illustrates a lateral view of the structure of the fluxcleaning apparatus illustrated in FIG. 5. FIG. 9 illustrates a rear viewof the structure of the flux cleaning apparatus illustrated in FIG. 5.

Referring to FIGS. 3 and 4, the cleaning chamber R may be sealed by anyof various sealing members to reduce the possibility of and/or toprevent steam from leaking to outside of the cleaning chamber R. Forexample, a cap 12 having a handle 11 may be installed on top of thecleaning chamber R and/or on top of the body 10 that houses the cleaningchamber R. The cleaning chamber R and/or the body 10 may have an openingthat accommodates the cap 12 such that in a closed configuration, e.g.,when the cap 12 completely covers the opening such that the cap 12 isdisposed within the opening to completely close the opening, the cap 12may act as a sealing member that seals and/or encloses the cleaningchamber R. In an open configuration, e.g., when the cap 12 is in anon-covering relationship with respect to the opening or covers apartial portion of the opening, an object with flux 1 may be insertedinto and/or removed from the cleaning chamber R.

According to an exemplary embodiment, as illustrated in FIGS. 3 and 4, auser may grab the handle 11 and lift up the cap 12 to form the openconfiguration. After forming the open configuration, the object withflux 1 may be mounted on the mount 20 inside the cleaning chamber R.After mounting the object with flux 1, the cleaning chamber R may beclosed by replacing the cap 12, e.g., by forming the closedconfiguration.

Referring to FIG. 3, a transparent window 13 may be arranged on asidewall of the cleaning chamber R and/or the body 10 so that, e.g., auser may observe a status of a cleaning operation within the cleaningchamber R through the transparent window 13. The transparent window 13may be located at a position on the body that corresponds to theplacement of the mount 20. A camera (not shown) may be installed, sothat a user may observe the cleaning operation via an external device,e.g., a monitor. The user may use the monitor to, e.g., verify aninternal status of the cleaning chamber R and the status of a cleaningoperation.

The mount 20 may be installed inside the cleaning chamber R in the body10, e.g., as illustrated in FIGS. 1 and 2. When the flux cleaningapparatus is in an operational mode, e.g., a cleaning operational mode,the object with flux 1, such as a flux tool or an attachment tool usedin a separate semiconductor manufacturing process, may be mounted on themount 20.

The mount 20 may include a clamp 21 to fix the object with flux 1 byholding side surfaces of the object with flux 1. For example, onelateral end of the object with flux 1 may be mounted within the mount20, e.g., without a clamp 21, and an opposing lateral end of the objectwith flux 1 may be held by the clamp 21. According to an exemplaryembodiment, the object with flux 1 may be mounted on the mount 20 andfirmly fixed by the clamp 21, so that the object with flux 1 may berestricted from movement, e.g., will not move, during a cleaningoperation. The clamp 21 may be movable, e.g., in a direction toward andaway the object with flux 1, such that the clamp 21 may firmly fix theobject with flux 1, according to an exemplary embodiment. However,embodiments are not limited thereto, e.g., any of various types ofclamps and combinations thereof for holding and fixing the object withflux 1 may be used. The clamp 21 may be installed on two opposite sidesof the object with flux 1, or any of various types of clamps for holdingand fixing the object with flux 1 may be applied to fix the sides of theobject with flux 1.

The steam spraying nozzle 30 may be at least one unit installed insidethe cleaning chamber R of the body 10. The steam spraying nozzle 30 maybe configured to spray steam S that may have a high temperature and mayhave a high pressure. The steam S may be quickly evaporated after beingsprayed on the object with flux 1, e.g., the steam S may be immediatelyevaporated after instant cleaning of the object with flux 1. Accordingto an exemplary embodiment, impurities 7, e.g., impurities that includethe flux F, on the object with flux 1 may be removed by spraying thesteam S. As illustrated in FIG. 1, the impurities 7 may be collected inthe cleaning chamber R.

The steam spraying nozzle 30 may be installed on a nozzle rotation shaft31, e.g., a freely-rotatable nozzle rotation shaft 31. For example, aplurality of steam spraying nozzles 30 may be spaced apart on the nozzlerotation shaft 31, e.g., may be spaced apart by a predetermined distanceon a freely-rotatable nozzle rotation shaft 31. The nozzle rotationshaft 31 may be configured so that a spraying angle of the streamspraying nozzle 30 may be adjustable. For example, the nozzle rotationshaft 31 may be capable of rotating at least 180 degrees, such that thesteam S may be sprayed from various angles onto the object with flux 1.A rotation knob 32 may be installed on an end of the nozzle rotationshaft 31, e.g., at an end that opposes the end of the nozzle rotationshaft 31 that includes the steam spraying nozzle 30 disposed thereon.

A user may manipulate the nozzle rotation shaft 31 using, e.g., therotation knob 32. For example, the user may manually adjust an angle,e.g., an angle between ±40° and ±90° with respect to a horizontaldirection and/or with respect to the extending direction of the nozzlerotation shaft 31, at which the steam S is sprayed toward the objectwith flux 1. By adjusting the angle, a cleaning operation may beperformed at an optimum angle.

The angle of the nozzle rotation shaft 31 may be adjusted automaticallyand/or by a control device. For example, the flux cleaning apparatus mayinclude a motor 33 for rotating the nozzle rotation shaft 31. The motor33 may operate according to a control signal generated from a controlunit 34. The control signal may be generated based on a command inputvia a command input unit 35. The command input unit 35 may be installedon the nozzle rotation shaft 31.

A user may automatically adjust an angle, e.g., an angle between ±40°and ±90° with respect to a horizontal direction, at which the steam S issprayed toward the object with flux 1 by using the command input unit35. The user may automatically adjust the angle using, e.g., the commandinput unit 35, so that a cleaning operation may be performed at anoptimum angle. The angle at which the steam S is sprayed may beautomatically varied based on a program. The program may be inputted inadvance of the cleaning operation, and may be configured for maximizingcleaning efficiency.

The steam supplying unit 40 may be installed on the body 10. Forexample, the steam supplying unit 40 may be under the cleaning chamber Rwithin the body 10. The steam supplying unit 40 may be connected to thesteam spraying nozzle 30. The steam supplying unit 40 may supply steam Sto the each of the plurality of steam spraying nozzles 30. The steam Ssupplied by the steam supplying unit 40 may have both a high temperatureand a high pressure.

The steam supplying unit 40 may be any of various types of steamsupplying units. For example, the steam supplying unit 40 may be aboiler that converts water to steam having a high temperature and a highpressure by boiling the water.

According to an exemplary embodiment, the steam S supplied by the steamsupplying unit 40 may have a high temperature, and the steam S maybecome the steam S that has a high temperature and a high pressure, asit passes through the steam spraying nozzle 30. The steam S may removethe impurities 7 that include flux F. For example, the steam S havingthe high temperature and the high pressure may clean the object withflux 1 by quickly and precisely dissolving flux F remaining on theobject with flux 1.

Without intending to be bound by this theory, the steam S that has ahigh temperature and a high pressure, may collide with the flux F on theobject with flux 1 at a high speed by way of the steam spraying nozzle30 directed toward the object with flux 1. The steam S having the highspeed may clean the object with flux 1 by melting, e.g., instantlymelting, the flux F and separating the flux F from the object with flux1. The flux F on the object with flux 1 may be melted, e.g., instantlymelted, upon being contacted by the steam S. Furthermore, the steam Shaving a high temperature may evaporate, e.g., evaporate quickly, andthus the object with flux 1 may be quickly dried after being cleaned.

The total cleaning time using a conventional in-water ultrasoniccleaning method, e.g., is about 87 minutes, which includes ultrasoniccleaning time of about 27 minutes, oven drying time using a heating ovenof about 40 minutes, and cooling time of about 20 minutes. In contrast,the total cleaning time using a steam cleaning method, according to anexemplary embodiment, may be only about 2 minutes, which includes steamcleaning time of about 1 minute and cooling time of about 1 minute.Therefore, cleaning time may be significantly reduced, according to anexemplary embodiment.

The reciprocator 50 may reciprocate the movable steam spraying nozzle30. For example, the steam spraying nozzle 30 may move back and forthalong a surface of the object with flux 1, and the reciprocator 50 mayinclude a movable base 51, a guidance member 52, an actuator 55, and thecontrol unit 34.

Referring to FIG. 1, the movable base 51 may be a unit to which thenozzle rotation shaft 31, along which the steam spraying nozzles 30 areinstalled in a row, is installed. The movable base 51 be configured toassist movement of the steam spraying nozzles 30, e.g., the movable base51 may assist the steam spraying nozzles 30 in freely moving back andforth along a surface of the object with flux 1.

The guidance member 52 may guide a path in which the movable base 51 istransported. The guidance member 52 may include a guidance rod 53, whichpenetrates the movable base 51. The guidance member 52 may include aguidance rail 54 that guides the bottom surface of the movable base 51.Alternatively, any of various types of guidance members may be appliedto form the guidance member 52.

The actuator 55 may be installed on the body 10, e.g., the actuator maybe enclosed within the body 10. The actuator 55 may include variouscylinders or motors, e.g., a linear motor, for moving the movable base51 in opposing directions, e.g., for moving the movable base 51 back andforth.

The control unit 34 may apply a control signal to the actuator 55. Thecontrol signal may be applied according to a command input by thecommand input unit 35.

Blocking brushes 36, e.g., as illustrated in FIG. 6, may be installed ina row between the cleaning chamber R and the guidance member 52 to,e.g., reduce the possibility of and/or prevent the steam S frompermeating into the movable base 51, the guidance member 52, and theactuator 55. The blocking brushes 36 may extend in a direction parallelto the extending direction of the guidance member 52.

A user may move the steam spraying nozzle 30, e.g., in back and forthdirections, along the bottom surface of the object with flux 1 forperforming a cleaning operation at an optimal location and/or an optimalspeed. The location of the steam spraying nozzle 30 and the speed atwhich the steam spraying nozzle 30 moves back and forth may beautomatically varied based on a program. The program may be inputted inadvance in order to maximum cleaning efficiency.

The discharging tray 60 may be installed under the cleaning chamber R ofthe body 10 to collect the impurities 7 removed from the object withflux 1 by the steam S. The discharging tray 60 may be a drawer-type trayinstalled below the cleaning chamber R. The discharge tray 60 may beremovable from the body 10 for easy discharging of the impurities 7. Forexample, the discharge tray 60 may have attached thereto a handle 61.The handle 61 may be installed on a lateral side of the discharging tray60, so that the impurities 7 collected by the discharging tray 60 may beeasily discharged. However, embodiments for removing the impurities 7from the cleaning chamber R are not limited thereto. For example, adrainage hole may be installed in the cleaning chamber R to dischargethe impurities 7 out of the cleaning chamber R and the body 10.

According to an exemplary embodiment, the flux cleaning apparatus may bean apparatus for cleaning a flux tool 2 used for a flux dotting process,e.g., as illustrated in FIGS. 1 and 2. Although not shown, the fluxcleaning apparatus may also clean any of various tools with impurities 7that include flux F thereon, such as an attachment tool used for asolder ball attaching operation.

The flux tool 2 may include a body 3. The body 3 may have a flow spaceformed therein, e.g., the flow space may be a channel. The flux tool 2may include a back plate 5. The back plate 5 may be housed in the flowspace of the body 3. The back plate 5 may be movable within the body 3.The flux tool 2 may include a flux pin 6, e.g., a plurality of flux pins6 may be mounted on, e.g., directly on, the back plate 5. The flux pin 6may include a first tip installed on the back plate 5 and a second tipexposed to outside of the body 3 via a pin hole 1 a in the body 3, asillustrated in FIG. 2. Each flux pin 6 may extend from inside the body 3to outside the body 3. The flux tool 2 may include an elastic spring 4.The elastic spring 4 may be installed between the back plate 5 and thebody 3, so that a recovery force may be exerted in a direction in whichthe flux pin 6 moves forward.

When cleaning the flux tool 2, the positive pressure forming unit 80 mayform a positive pressure in the flow space in the body 3 of the fluxtool 2. The positive pressure forming unit 80 may reduce the possibilityof and/or prevent the steam S from permeating into the flow space of thebody 3. As such, the positive pressure forming unit 80 may protect theobject with flux 1 from the steam S. The positive pressuring formingunit 80 may apply positive pressure directly to flow space of the body3, as illustrated in FIG. 2.

According to an exemplary embodiment, the positive pressure forming unit80 may be a positive pressure forming gas supplying pipe 81. The gassupplying pipe 81 may supply a positive pressure forming gas to an inlet1 b formed in the body 3 of the flux tool 2, e.g., as illustrated inFIGS. 1 and 2.

If a positive pressure is formed inside the body 3 of the flux tool 2,e.g., by supplying a positive pressure forming gas such as air or aninert gas via the positive pressure forming gas supplying pipe 81, thepositive pressure forming gas may be discharged from the inside of theflux tool 2 to the outside of the flux tool 2. For example, the positivepressure forming gas may be discharged to outside the body 3 via anarrow gap between the flux pin 6 and the pin hole 1 a of the body 3.The discharged positive pressure forming gas may push the steam Sheading in a direction toward to body 3 back to the cleaning chamber R.As such, the possibility of the steam S entering into the body 3 via thepin hole 1 a may be reduced and/or prevented. Therefore, the flux tool 2may be protected from moisture.

At the same time, the positive pressure forming gas may also dry theflux tool 2 and cool down the flux tool 2, of which a temperature mayhave risen due to the steam S.

The air curtain forming unit 70 may be installed to form an air curtainbetween the flux pin 6 and the body 3. The air curtain forming unit 70may reduce the possibility of and/or prevent the steam S being sprayedtoward the flux pin 6 from reaching the body 3 of the object with flux1. The air curtain forming unit 70 may be installed inside the cleaningchamber R of the body 10. The air curtain forming unit 70 may include anair spraying nozzle 71. The air spraying nozzle 71 may spray air to aspace between the flux pin 6 and the body 3.

Referring to FIG. 2, when an air curtain is formed between the flux pin6 and the body 3 by the air spraying nozzle 71, the steam S in thecleaning chamber R may be protected and/or prevented from flowing towardthe body 3. Thus, the flux tool 2 may be protected from moisture. Assuch, the air curtain forming unit 70 may protect the object with flux 1from the steam S. The air sprayed from the air spraying nozzle 71 mayalso dry the flux tool 2 and cool down the flux tool 2, of which thetemperature may have risen due to the steam S.

The exhausting unit 90 may be connected to the cleaning chamber R. Theexhausting unit 90 may quickly discharge the steam S sprayed by thesteam spraying nozzle 30 to outside, e.g., to outside the cleaningchamber R and/or to outside the body 10. As illustrated in FIGS. 1 and2, the exhausting unit 90 may be an exhausting pipe 91. The exhaustingpipe 91 may forcefully discharge the steam S via an exhausting hole 10 aformed in a sidewall of the cleaning chamber R and/or in a sidewall ofthe body 10.

After the steam S sprayed by the steam spraying nozzle 30 finishescleaning, the steam S may be quickly discharged to outside via theexhausting pipe 91 to protect the flux tool 2 from moisture of the steamS. At the same time, the flux tool 2 may be quickly dried and the fluxtool 2 may be cooled, e.g., by the air curtain forming unit 70 and thepositive pressure forming unit 80.

The flux cleaning apparatus, e.g., according to the exemplaryembodiments discussed above, may clean a flux tool or an attachment toolwith flux quickly and precisely and may prevent deformation of a fluxtool or an attachment tool due to permeation of moisture, and thus theyield of semiconductor fabrication may be significantly improved.

By way of summation and review, when a wire or a solder ball is bondedin a semiconductor fabrication process, a flux application process forapplying flux to a pad of a substrate to improve adhesiveness of thebonding may be used. The flux may be, e.g., a chemical agent thatfacilitates soldering, removes impurities, and/or prevents oxidation ofa base metal. Such a flux application process may include a flux dottingprocess. The flux dotting process may include applying flux to tips of aplurality of flux pins, e.g., by using a flux tool having the pluralityof flux pins. The flux dotting process may also include contacting theflux tool to a substrate, e.g., a pad on the substrate, to place ontothe substrate the flux drops on the tips of the flux pins. The flux toolmay facilitate dropping the flux on, e.g., directly on, the pad on thesubstrate.

During the flux dotting process, operations may be successivelyperformed, e.g., on the substrate. An exemplary operation includes anoperation of attaching a solder ball by putting the solder ball on thepad of the substrate. The pad of the substrate may have flux thereon,which may adhere the solder ball by a vacuum hole. The flux may havebeen dotted onto the pad of the substrate by using an attachment tool.

To remove flux remaining on an apparatus, such as a flux tool after theflux dotting process or an attachment tool after the solder ballattaching operation, a cleaning apparatus may be used. For example, thecleaning apparatus may be a cleaning apparatus for washing flux pins bydipping the flux pins into a high-temperature cleaning liquid or acleaning apparatus for decomposing flux in a cleaning liquid by applyingan ultrasonic wave to the cleaning liquid.

However, such a cleaning apparatus, which uses a cleaning liquid,requires a relatively long period of time for decomposing flux in thecleaning liquid and requires relatively long periods of time for dryingcleaning liquids remaining on a flux tool or an attachment tool.Further, the cleaning apparatus may require relatively long periods oftime for cooling the flux tool or the attachment tool. Therefore,overall cost and time for cleaning the flux are significantly high insuch a cleaning apparatus.

Further, due to a capillary phenomenon, a large amount of cleaningliquid may permeate into the flux tool and cause components therein torust. Thus, locations of flux pins in the flux tool may be altered.Therefore, the flux may not be dotted on the desired locations on thesubstrate, e.g., the flux may not be dotted onto some of the pads on asubstrate or may be dotted to wrong locations on the substrate. As aresult, the yield of semiconductor fabrication is significantlydeteriorated.

Embodiments, e.g., the exemplary embodiments discussed above, relate toa flux cleaning apparatus and to a flux cleaning apparatus that maycleans a flux tool or an attachment tool having flux thereon by using aproperty of steam. For example, the flux cleaning apparatus, accordingto an exemplary embodiment, may use steam that evaporates immediatelyafter instant washing, quickly and precisely, and may reduce thepossibility of and/or prevent deformation of a flux tool or anattachment tool due to permeation of moisture. Thus, the yield ofsemiconductor fabrication may be significantly improved. Further,significant reductions in cleaning time, drying time, and cooling time,may be achieved by using a property of steam.

Example embodiments have been disclosed herein, and although specificterms are employed, they are used and are to be interpreted in a genericand descriptive sense only and not for purpose of limitation.Accordingly, it will be understood by those of skill in the art thatvarious changes in form and details may be made without departing fromthe spirit and scope of the present invention as set forth in thefollowing claims.

1. A flux cleaning apparatus for cleaning an object with flux byremoving impurities that include flux from the object with flux, theapparatus comprising: a body; a mount coupled with the body for mountingthe object with flux; at least one steam spraying nozzle coupled withthe body for spraying steam toward the object with flux on the mountsuch that the object with flux is cleaned by the steam sprayed from thesteam spraying nozzle; and a steam supplying unit coupled with the body,the steam supplying unit supplying steam to the at least one steamspraying nozzle.
 2. The flux cleaning apparatus as claimed in claim 1,further comprising a nozzle rotation shaft having the at least one steamspraying nozzle thereon such that a spraying angle of the steam sprayingnozzle is adjustable.
 3. The flux cleaning apparatus as claimed in claim2, further comprising a rotation knob on an end of the nozzle rotationshaft such that the nozzle rotation shaft is movable by a user via therotation knob.
 4. The flux cleaning apparatus as claimed in claim 2,further comprising a motor that rotates the nozzle rotation shaftaccording to a control signal generated from a control unit based on acommand input via a command input unit, the motor being coupled with thenozzle rotation shaft.
 5. The flux cleaning apparatus as claimed inclaim 1, further comprising a reciprocator that moves the at least onesteam spraying nozzle in back and forth directions along a surface ofthe object with flux.
 6. The flux cleaning apparatus as claimed in claim5, wherein the reciprocator includes: a movable base, the at least onesteam spraying nozzle being connected to the movable base; a guidancemember that guides a path in which the movable base is movable; anactuator in the body, the actuator being configured to move the movablebase in the back and forth directions; and a control unit, the controlunit being configured to apply a control signal to the actuator based ona command input by a command input unit.
 7. The flux cleaning apparatusas claimed in claim 1, further comprising a clamp that fixes the objectwith flux by holding side surfaces of the object with flux, the clampbeing coupled with the mount.
 8. The flux cleaning apparatus as claimedin claim 1, further comprising a cleaning chamber in the body, thecleaning chamber having an internal space for housing the mount and thesteam spraying nozzle.
 9. The flux cleaning apparatus as claimed inclaim 8, further comprising a cap with a handle on top of the cleaningchamber, the cap being removable from the cleaning chamber for insertingand removing the object with flux from the cleaning chamber.
 10. Theflux cleaning apparatus as claimed in claim 8, further comprising atransparent window in a sidewall of the cleaning chamber such that aninterior of the cleaning chamber is observable by a user.
 11. The fluxcleaning apparatus as claimed in claim 8, further comprising anexhausting unit connected to the cleaning chamber such that steamsprayed by the steam spraying nozzle is discharged to an outside of thebody via the exhausting unit.
 12. The flux cleaning apparatus as claimedin claim 11, wherein the exhausting unit is an exhausting pipe thatforcefully discharges steam via an exhausting hole in a side surface ofthe cleaning chamber.
 13. The flux cleaning apparatus as claimed inclaim 8, further comprising a discharging tray coupled with the body,the discharging tray collecting impurities removed from the object withflux.
 14. The flux cleaning apparatus as claimed in claim 13, wherein:the discharging tray is a drawer-type tray under the cleaning chamber,and the discharging tray includes a handle on a side thereof such thatimpurities collected by the discharging tray are dischargable.
 15. Aflux cleaning apparatus including an object with flux being cleaned bythe flux cleaning apparatus by removing impurities that include fluxfrom the object with flux, the system comprising: a flux tool, the fluxtool being the object with flux being cleaned by the flux cleaningapparatus, the flux tool including: a flux tool body that includes aflow space therein, a back plate within the flow space of the flux toolbody, a flux pin, the flux pin include a first tip on the back plate anda second tip outside the flux tool body, the second tip extendingthrough a pin hole in the flux tool body, and an elastic spring, theelastic spring being between the back plate and the flux tool body suchthat a recovery force is exerted in a direction in which the flux pin ismovable, and the flux cleaning apparatus including: a body, a mountcoupled with the body for mounting the flux tool, at least one steamspraying nozzle coupled with the body for spraying steam toward the fluxtool on the mount such that the flux tool is cleaned by the steamsprayed from the steam spraying nozzle, and a steam supplying unitcoupled with the body, the steam supplying unit supplying steam to theat least one steam spraying nozzle.
 16. The system as claimed in claim15, further comprising a positive pressure forming unit that produces apositive pressure in the flow space of the flux tool body to protect theflux tool body from the steam sprayed from the at least one steamspraying nozzle.
 17. The system as claimed in claim 16, wherein thepositive pressure forming unit is a positive pressure forming gassupplying pipe that supplies a positive pressure forming gas to an inletin the flux tool body.
 18. The system as claimed in claim 15, furthercomprising an air curtain forming unit that provides an air curtainbetween the flux pin and the flux tool body to protect the flux toolbody from the steam sprayed from the at least one steam spraying nozzle.19. The system as claimed in claim 18, wherein the air curtain formingunit is an air spraying nozzle on the body, the air spraying nozzlebeing configured to spray air to a space between the flux pin and theflux tool body.
 20. (canceled)